Trapdoor Springfield number look up

[kwc271]

Hello all,
I was wondering if anyone can tell me when my trapdoor was made and possibly to whom or where it was issued ? The number is 317806

Thank you!
Kevin

[Tom Trevor]

Should be a cartouche stamp on stock for year 1887. Once in a while you get lucky in this case not. Serial numbers are listed in SRS for 317802, 317803, 317805, 317807 and 3217816.

[kwc271]

Oh ok, thank you very much. Too bad the surrounding numbers are listed but not that one.

Thanks again